Device for fixing shanks or screw-stems in handle-knobs or picture-hanging nails.



' No. 660,444. Patented Oct. 23, I900.

's. KRIBS. DEVICE FOR FIXING SHANKC 03 SCREW STEHS INHANDLE KNOBS 0R PICTURE HANGING NAILS.

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No. 660,444. Patented Oct. 23, I900.

v s. KRIBS. DEVICE FOR FIXING SNANKS 0B SCREW STEMS IN HANDLE KN OB S 0R PICTURE HANGING NAILS.

(Application flldd Juno 8, 1900.) (No Model.) 2 Sheets-Sheet 2.

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oEvice For HXl-NGSHANKS on scnzw-srtms m HANDLE-K-NOBS 0s PlCTURE-HANGING NAILS.

srncmrca'rron forming part of Letters Patent No. 660.444, dated octberzzs, 1900.

Application and 1m 8. 1900.

To all whom it may concern:

Be it known that 1, SERAPHIN KRIBS, a'eitizen of the United States, and a resident of the cityof New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Device for Fixing Shanks or Screw-Stems in Handle-Knobs or Picture-Hanging Nails, of which the following is a full, clear, and exact description.

This invention has for its object to provide novel and improved means for holding in proper position thevshanks or screws of handle-knobs and picture-hanging nails whilein process of manufacture, the handle-bodies being formed of molten glass, clay, or any suitabl'e composition of clay or other matter which is plastic, but adapted for subsequent hardening by applied heat.

The invention consists in the construction and combination of parts, as is hereinafter descrihed,aud defined in the appended claims. Reference is to be had to the aecom panyin g drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side. elevation of the device. Fig. 2 is a partly-sectional plan, view substantially on the line 2 2 in Fig.1. Fig. 3 is an enlarged partly-sectional front elevation of the machine in part, substantially on the line 3,3 in Fig. 1. Fig. 4is a side view of the usual form of a metal knob-shank that is adapted for fixturein the knob-body by the improved machine. Fig. 5 is a partly-sectionab side elevation of a detachable chuck-block and a nail-body removably held therein, the section being substantially on the line 5 din Fig. 6. Fig. 6 is a side view of the chuck-' block and nail shown in Fig. 5, taken at 'a right angle to the view shown in Fig. 5. Fig; 7 is a partly-sectional side view of the chuckblock, showing a screw-stem detachably held therein, a portion of the screw-body projecting from, the chuck-block to be embedded within the plastic material of a knob-body; and Fig. 8 is a sectional side view of a knob body having the screw-stem bedded therein and projecting vertically therefrom.

In the drawings that show the construction and application of the invention, 9 indicates the bedplate of the machine, preferably floor or like support.

sax-1:1 Romano. or model.)

mounted upon casters 10 to adapt the complete machine for free movementoveralevel The bed-plate 9 may be circular, as indicated in, Fig; 1, and from its center a hub 9 projects upwardly to a.

suitable height and also may extend'below theplate; A frame-post 11 is erected vertically upon the bed-plate 9 by a secured ongagement of its lower end within a central vertical perforation in the hub 9, and a turntable-12 is'loosely mounted upon the framepost 11 andse'ats upon the lever-top'surfac'e of the hub 9. The to rn-table 12 maybe circular, as shown in Fig. 2, and a plurality of spaced mold-bases 13 are .detachably secured by any suitable means upon the true upper surface of the turn-table, said mold-bases being arranged concentric to the axis of the frame-post 11, as indicated in Fig. 2.

A bod y-rnold for knobs or pictu re-nail heads is provided comprising the following details of construction: Two half-sections l4 14. are jointed together by the lapped and pivoted engagement of two limbs a a, which project from the sides ofsaid mold-sections, and oppositely from said limbs handle-bars b b project outwardly from the mold-sections, as shown in Fig. 2. The mold-bases 13 are circular and are each undercut near the bottom on the outer surface, as shown at c in Figs. 1 and 3. In the upper surface of each mold-base 13 a depression 0' is formed, that will representthe pattern or design to be given to the outer face of a knob-bod y. The two half-sections 14 140E the mold are level on the edges thatimpinge upon each other when the mold is closed, and extending inward from said edges opposite depressions of a like form are produced, these depressions 0 being the cheekmatrices which shape the side of the knobbody formed in the complete mold. The cavities in the mold-sectionshi 14 are so shaped near the lower edges thereof as to embrace .the side wall and undercut portion of each mold-base 13 when the half-sections 14 14 are placed upon it,as will be further-explained. The half-sections 14 14 have their handles b b provided with a securing device,preferably formed as shown in Figs. 1 and 2. This cousists of a hook d, pivoted upon one handlebar band projecting over the other handie-bar when the half -secti ons are closed.

Upon the other handle-bar a'locking flange or lip d. is formed or secured, whereon the hook (2 will lock when saidhook is rocked to-v ward the lip or flange. A'sleeve d is loosely 5 mounted upon the handle-bar whereon the hook (I is pivoted,and to the hook and the inner end of the sleeve (1 a link e is loosely I v when the half-sections are clamped thereon,

are intersected by a rounded opening g,which is formed one-half in the inner edge of. each cheek-section,this opening being central with regard to the recesses in the mold-sections 2 and affords access to the. matrix of the cheekmold from the upper side of the mold-sections when the latter are clamped together upon one of the mold-bases 13.

A bracket-frame 11 is held upon the post 0 11, so as to project laterally therefrom, and on the outer portion-of said frame a presserbar 11 is held to slide vertically. A lever 11 is pivoted intermediatelyof its ends upon the top of the'slidable presser-bar 11 and is also 5 pivoted upon the upper end of a link-bar 11, which is pivoted at its lower end upon the upper portion ofthe bracket-frame 11" between the post 11 and presser-bar 11". Upon the portion of the lever l1 which extends over the post- 11 a weight-block 11 is movably secured, the gravity of which is adapted to counterbalance the weight of the presser-bar 11" and a chuck-block that is removably secured upon the lower end of the presser-bar. 5 The chuck-block mentioned may be somewhat changed in minor details to adapt it for holdinga knob-shank, a screw-stem, or a pic ture-nail body, these slightly-changed forms 'being shown in Figs. 3, 5, 6, and 7.

, 0' The mold (shown 'sectionallyin Fig. ayis shaped in its matrix to give the usual form to a knob which is molded either from molten glass, plastic clay, or a composition having clay as an. element. 5

When door-knobs are to be molded, a metal .shank 16 (shown in Fig. 4) is furnished for each knob, said shank having the usual form and being flanged, as at h,'near the center of length, said peripheral flange determining the do depth of insertion of the shank'into the plastic material of the knob'as the knob is being formed.

The chuck-block 17 (shown in Figs. 1 and 3 as connected with the lower end of the presser-bar 11) is especially designed for holding a knolrshank 16 when the latter is to be introduced within a filled mold. The body of the chuck-block 17 may with advantage be cylindrical and have a central socketformed in its upper end, wherein is inserted and secured the diametrically-reduced lower end of the presser-bar 11. An axial perforation i is formed in the body of the chuck-block 17 to receive a spindle 18, held inplace by a cross-pin 'i', that passes through alined perforations in the chuck-block and upper portion of the spindle, as shown'in Fig. 3. A detent-spring 19 is secured near its upper end upon the side of the spindle 18, and its free lower end is adapted .to engage within the axial perforation in the knohwshank 16 when the latter is introduced within the counterbored lower portion 7? of the axial perforation The chuck-block is held in place on the When theknob-shank 16 is placed within the lower end press'er-bar 11 by a set-screw i.

of thechuck-block 17, the flange '71 on the knob-shank will be seated in a shallow recess formed to receive it in the lower end of the:

chuck-block, as shown in Fig. 3, the resilient body of the detect-spring 19 then passing-into the knob-shank, so as to temporarily hold it in place, projecting t-he'portion of the knob- .shank below the flange it beyond the lower end of the chuck-block.

In Figs. 5 and 6 the chuck-block '17 is held in place on the reduced lower end of the presser-bar 11 by a set-screw 11, and in the i lower end of the chuck-block'an axial perforation is formed which will receive the body of a wire nail 20, which is to have a glassor vitrified clay head 20 fixed thereon by amold on the machine, hereinbefore described. It

will be seen that in the chuck-block l7 alateral openingk'is formed, and the axial perforation therein intersects said lateral opening, so that the detenti-spring 19, which has its upper end secured upon the bottom wall of the lateral opening in the chhckhlock, may press its resilient lower portion upon the body of the nail-20, that has been'inserted within the lower endof t-he chuck-block;-

In Fig. 7 the chuck-block 17" is formed essentially the same as thechuck-block 17*, the relative proportion of the interiordetails bein g somewhat changed to enable the chuck to hold the screw-stem 21 projected suflicient-ly below the chuck-block to permit it to prop--- erly enter the three-part mold.

The screw-stem 2-1 is preferably employed 4 for the attachment of knob-handles, such as 22, (shown sectionally in Fig. 8,) upon drawers or the like. 2 v

At the front of the molding-machine a metal bracket-stand 9" 'is positioned upon the bedplate 51 and is so proportioned in height as to Miami support to the portion 'of the tahle12' which is directly below a mold-base 13. A y f latch-bolt m is held to slide upwardly through alined perforations in the bed-plate 9 and the upper portion of the bracket-stand 9 and a spring 9, that encircles the latchbolt, is

adapted to press said bolt upwardly, the lower. portion of the latter extending below the bedplate to permit of manipulation for a depres sion of the bolt.

Directly opposite ea'ch'mold-ba'sel3 a latch ing-recess a is formed in the bottom of the turn-table 12, these recesses each having a sloped side correspondingwith the sloped side on the head of the l atch-bolt'm, the opposite side of the recess forming a shoulder against which the straight side of the latch-bolthead will impinge and prevent a'rotation of the.

turn-table except in the direction of the arrow win Figs. 2 and 3.

In operation one of the mold-bases 13 is located at the front of the machine by turning the table 12,which will dispose the presserbarll" directly over the center of said 1nold'- base. I The mold-sections'l i, which complete the body-mold for a knob or the head of a picture-nail, are now adjusted so as to clearly embrace the mold-base which is at the front of the machine over the bracket-stand 9", and

the pivot a, which passes through the ears a,

is extendeddown through one of a series of V perforations a, formed in the tnrn-table12 to receive said pivot. Assuming that the device is to be used for the formation of doorknobs and that the ob uck-block 17 is seen red to the presser-bar 11", the knob-shank 16 is the opening in its upper face, and the lever 4o now inserted within the chuck-block, so that the part thereof below the circumferential flange 71- will project below the chuck-block. 'lhe knobshank has'an opening 0, formed laterally in the depending end of the same; so that material forming the knob-body may pass through said opening, and thus lock the shank in the kuob-body. The operator now introduces a proper quantity of either molten glass or plastic clay into the mold through 11, which has previouslybeen elevated at the front end to raise the pressr-bar 11 is now depressed, which will forcibly introduce the knob-shank 16 within the molduntil the fiange'h is seated upon the. material of the knob. The operator now lifts the front end of the lever 11, and this elevates the presserbar 11 detaching its lower end from the knob-shank in an obvious manner. The to mtable 12 is'now mov'edin the direction ofthe arrow 0:, so as to locate another mold-base 13 .over the bracket-stand 9", and the operation may be repeated, the cooled knob being removed by the operator or an attendant helper.

It will be evident that porcelain'clay or other clay in plasticform suitable forthe .mannfacture of knobs may be used and readily introduced into. the mold, the depression of the pr'esser-bar, with a knob shank held on its lower end, serving to force said shank into p the plastic material of the knob-body, and thus combinethe shank with the knob-body; wherein the shank is subsequently fixed by heat sufficient to bake the clay.

B y substituting the ch lick-blocks 17* or 17* and changing the mold-bases and cheek-mold sections the heads of picture-hnnging'nails or the screwstems of drawer-knobs, such as shown in Fig. 8 or any other design, may be rapidly made in the manner hereinbefore de scribed.

' It will be seen that the employment of the improved. machine facilitates the manufacture of door or drawer knobsand insures the perfect attachment of shanks or screw-stems thereto, said attached parts projecting'axially from the knob-bodies, which is very essential and is not the case when ordinary means for attaching the shanks or screw-stems to knobs is employed.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. In a device of the character described, the chuck for holding a screw-stem or knobshank depending from the chuck, comprising a cylindrical block attachable at the upper end to areciprocating presser-bar, and having a longitudinal socket therein, a spindle held in said socket concentric therewith, and a detent-spring of plate metal held by one end depending front the spindle and adapted to engage with a knob-shank or stem which is to be held depending from and detachablyconnected with the chuck. I

2. In a device of the character described, the device for holding two hinged mold-sections folded together and clamped upon a moldbase, comprising two handle-bars on the mold-sections, a rockable hook pivoted on one handle-bar and adaptedto hook on a projection on the other handle-bar when said bars 

